The Motofocus performs as advertised. It allows for precise focus at high power which is great for astrophotography. Installation was simple, and the included instructions were clear. Shipping was fast as well, and the item was very well packed in a sturdy box with foam compartments. The only downside is that for my particular telescope (old Super C8+) you have to remove the focus knob, and mount the Motofocus directly on the brass focusing collar. This leaves the focusing collar exposed when you remove the Motofocus, but that is only an aesthetic issue that is greatly outweighed by the utility and performance of the product.